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Facing Heads for Portable Line Boring Machines

JDA Machinery supplies facing heads for on-site machining contractors, industrial maintenance teams, and heavy equipment repair specialists who need to machine end faces, shoulders, and annular surfaces on installed components. Used with compatible portable line boring systems, facing heads support in-place machining of worn or damaged surfaces when dismantling large equipment for workshop repair is impractical.

Selecting the right facing head requires matching the required machining diameter and radial travel with the existing machine’s mounting interface, drive arrangement, and available working space. JDA Machinery can assess your application requirements to help identify a suitable configuration.

Line Boring Facing Tool
JDA Line Boring Facing Tool is an attachment for portable line boring machines, designed to machine flange faces, bore end faces, mounting surfaces and other flat mating surfaces on large equipment.
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The JDA FH60 Line Boring Facing Head is an attachment for portable line boring machines, designed for on-site machining of flange faces and mounting surfaces around existing bores. With a maximum...
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The JDA FH50N Facing Head is an attachment for portable line boring machines, designed to machine flange faces, bearing housing faces and other flat surfaces around existing bores. It mounts on...
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Facing Head Machining Capabilities

A facing head is selected according to the geometry of the surface to be machined and the movement required to reach it. Depending on the head design, tooling arrangement, and compatible boring system, typical applications may include:

Flat end faces

Machining an end surface perpendicular to the component axis.

Shoulders and stepped faces

Producing or restoring a shoulder where two different diameters meet.

Annular faces

Machining ring-shaped surfaces around an existing bore.

Damaged mating surfaces

Removing surface damage and restoring a suitable face for component assembly, where the required machining range and finish can be achieved.

Compatibility with Existing Portable Line Boring Systems

A facing head must match the mechanical connection, drive arrangement, and operating requirements of the portable boring system. Compatibility should be verified against the actual equipment rather than judged by nominal size or appearance alone.

Provide the following information for a compatibility assessment:

Equipment identification: Manufacturer, model, and available technical documentation for the portable line boring system.

Mounting dimensions: Boring bar diameter, connection dimensions, locating features, fastening arrangement, and available mounting length.

Drive connection: The existing drive output and the method used to transmit rotation to the facing head.

Installation space: Available axial clearance, surrounding structures, and the space required for tool movement.

Required machining dimensions: Target facing diameter, surface position, and any recessed or obstructed areas.

Radial Travel, Feed and Drive Configuration

Configuration	Key Parameters	What to Confirm Before Ordering
Radial Travel	Available tool travel and usable machining range	Required facing diameter, available radial travel, and tool clearance
Feed Mechanism	Manual or powered feed, adjustment method, and feed rate	Required feed mode and whether the existing machine supports the selected configuration
Drive Arrangement	Drive type, connection method, and operating requirements	Compatibility with the existing machine, required speed range, and available power
Tool Holder	Mounting method, tool dimensions, and adjustment range	Cutting-tool compatibility, tool reach, and access to the target surface
Mounting Interface	Connection dimensions, locating features, and fastening method	Boring-bar compatibility and whether an adapter is required

Machining Accuracy and Surface Finish

The required machining result should be defined before selecting a facing head. Final accuracy depends on the complete machining setup, including the facing head, mounting rigidity, alignment, drive system, cutting tool, and workpiece condition.

Specify the following acceptance criteria when requesting a technical assessment:

01.

Flatness

Permitted deviation across the machined face.

02.

Perpendicularity

Required relationship between the face and the component axis or reference datum.

03.

Surface roughness

Required finish, expressed as Ra or another specified parameter.

04.

Dimensional tolerance

Permitted variation in the finished facing diameter and other controlled dimensions.

Facing Head Configuration and Supply Scope

The quotation should identify the exact configuration being supplied rather than referring to the facing head alone.

Confirm whether the order includes:

Facing head assembly.

Required mounting adapters or connection components.

Tool holder and cutting tools.

Mounting hardware and any model-specific accessories.

Operating instructions and available technical documentation.

Spare Parts and Technical Support

For maintenance planning, identify the cutting tools, tool holders, and replaceable components by part number or drawing reference. Confirm which parts can be ordered separately and what information is required for replacement orders.

Before purchase, also establish the available technical support for:

Installation and connection guidance.

Operating instructions and feed adjustment.

Troubleshooting for drive, feed, or mounting issues.

Identification and supply of replacement parts.

FAQ

Q: Can a facing head machine a recessed surface inside a housing?

A: Potential suitability depends on recess depth, bore diameter, cutting-tool reach, radial travel, and the clearance available around the mounting assembly. Provide a sectional drawing with the target face and surrounding geometry so that tool access can be assessed before ordering.

Q: Can a facing head be adapted to a different portable line boring machine?

A: An alternative mounting arrangement may be possible, but it requires more than matching the connection diameter. The mating interfaces, locating features, fastening method, drive connection, available space, and operating requirements must all be reviewed before an adapter can be considered suitable.

Q: What should be checked when machining a thin or weakened component?

A: The remaining material thickness, component condition, clamping rigidity, and permitted material removal should be evaluated before machining. Provide the measured damage depth, original and finished dimensions, and minimum allowable remaining thickness to determine whether the proposed repair is feasible.

Q: What information should accompany a request for a facing head quotation?

A: Include the portable line boring machine's manufacturer and model, available connection drawings, required facing diameter, target surface geometry, feed and drive requirements, and specified machining tolerances. Photographs and workpiece drawings can help clarify installation constraints and reduce uncertainty during configuration review.

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